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Today, we'll uncover how to generate a Time-based One-Time Password (TOTP) straight from your Linux terminal using openssl and date +%s. This guide is aimed at enhancing your understanding of cybersecurity measures like two-factor authentication (2FA) while providing a practical example using common Linux tools. Q&A on Generating a TOTP Token in Bash A1. A Time-based One-Time Password (TOTP) token is a temporary passcode used in two-factor authentication systems. It combines something the user knows (a secret key) with something the user has (typically, a time source) to produce a password that changes every 30 seconds. Q2. Why use openssl and date +%s in Bash for generating a TOTP token? A2.